Regulator for electric translating devices



(No Model.) 0. B. SHALLENBERGER.

REGULATOR EOE ELECTRIC TRANSLATING DE VIGES. No. 390,911.

Patented Oct. 9, 18g/8.

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UNTTED STATES PATENT Ottica.

OLIVER B. SHALLENBERGER, OF ROCHESTER, ASSIGNOR TO THE TESTING- HOUSEELECTRIC COMPANY, OF PITTSBURG, PENNSYLVANIA.

REGULATOR FOR ELECTRG TRNSL/'ilb DJiCES.

SPECIFICATION' forming part of Letters Patent No. 8S10,9ll, datedOctober 9, 18238.

Serial No. 257,406. (No model.)

To @ZZ whom, t may concern.'

Be it known that l, OLivEi-c B. SHALLEN- BERGER, a citizen ofthe UnitedStates, residing in Rochester, in the county of Beaver, in

the State of Pennsylvania, haveinventcd certain new and usefulImprovements in Regulating Electric Translating Devices, (Case No. 172,)ol" which the following is a specification.

The invention relates to aplan ot' regulating 1o the current supplied ina system of alternatecurrent distribution to translating devicesforinst-ance, incandescent electric lamps.

The object ofthe invention is to provide convenient means wherebytranslating devices operated by alternating, intermittent, or pnlsatoryelectric currents may be operated under the influence of a difference ofpotential which may be varied as required between cert-ain limits.

The general plan of the invention is to con neet either thesupply-circuit or translatingcircuit with the terminals of a coil ofwire disposed about a core of soft iron while the other circuitiscapable of being connected through a greater or less portion of thelength. Ilhus the translating circuit may be connected through a greateror less length of wire disposed about a core of soft iron, the entirelength ol the coil being included between the conductors supplyingcurrent to the system, or the translating-circuit may be connectedbetween conductors leading from fixed pointsin the coil and an equal orgreater length of this coil included between the supply-conductors. Itis found that by preserving throughouta given coil a nxed difference ofpotential and applying one terminal of the translating-circuit todifferent points in the length of this coil, the other beingpermanent-ly connected 4o at one extremity ofthe coil, the difference ofpotential at the translating devices may be varied in the same way as ifa converter were employed having a secondary coil of adjustable length.

It is essential to the operation of this regulator that the core shouldbe common to all the coils, otherwise there would be no mutual inductionbetween the dierent sections of the coils.

If the translating devices are connected in xed relation to the coil,practically the saine etfects maybe accomplished by conncctingtheterminals of the supply-circuit to different points. By either of thesearrangements a greater current will traverse the translatingcircuitexcept when the two are equal. The device is usually employed, as hasbeen described, to reduce the potential on the translating devices belowthat of the supply-circuit; but the arrangei'nent may be such as toallow an increase above that potential,in which case the current is lessthan that of the supply-circuit. ln general, the product ofthedifference ot' potential and current in the supplycircuit isapproximately equal that-in thetranslating-circuit. The device cannottherefore be regarded as a variable shunt or series resistance, such ashas heretofore been employed for a like purpose.

ln the accompanying drawings, Figure l is a diagram iilust-rating amethod of Ycarrying out the invention, and` Fig. 2 illustrates aniodication.

Referring to the figures, L If represent mainline conductors leadingfrom any suitable source of alternating electric currents,and Z ZLconductors supplying translating devices d d. Between the conductors Land L2 there is connected a coil, P, of insulated wire disposed about acore, C. This coil may be considered as being divided into sections pp'lp3 pi. From these sections conductors l 2 3 +iare derived, leading toswitch-points s, s2, s, and 8*. lhe switch-arm S is designed to be movedover these points. rlhis switch-arm is connected by a conductor, 5, withone of the supply-conductors, Z2.

lhe lamps d d may be connected in multiple arc or otherwise between theconductor ZZ and the conductor l', which latter is derived from the lineL. By moving the switch-arm S along the points s s, &c., any requireddit'- ierence of potential may be obtained for the lamps, varying fromZero to the iull electrornotive force upon the circuit, the greatestbrilliancy being secured when the switch S is upon the point s.

ln Fig. 2 a modification is shown in which the translating devices areconnected to a delinite length, p5, ofthe regulating-coil, while the IOOregulation is effected by moving a switch-arm, S, which is connectedwith the conductor L, over the points s si s3, &c. One terminal of thesection p5, it will 'be understood, is connected with the conductor 6,while the conductor Z7 leads to the switch-points, connected with thesection plof the regulating-coil. rlhe conductor Z is derived from theline L. In this instance the effect of moving the switch to the left isto lengthen the primary circuit, and the result isjust thc same asdecreasing the length ofthe secondary circuit in Fig. l-that is to say,the ratio of conversion is reduced and the lamps are turned down. ThepointsG is shown connected by a dotted line to a point Within thesection p5. By placing the switch S upon this point the diiierence ofpotential may be increased above that of the circuit L L2.

I claim as my invention- 1. The combination, with a source ofalternating electric currents and one or more trans` lating devices, ofregulating coils, a core of magnetizable material common to all thecoils, a circuit across the poles ot' the source including said coils,and a circuit including the translating devices in series with a portionof the coils.

2. The combination, with a source of alternating electric currents andone or more translating devices, of regulating-coils and a core ofmagnetizable material common to all the coils, a circuit across thepoles of the source Including said coils, a circuit including thetranslating devices in series With a portion of 35 the coils, and adevice for varying the length ofthe latter portion.

3. The combination of translating devices, a source of electricitysupplying currents thereto, regulating-coils, a core of magnetizablematerial common to all ot said coils, the coils having a portion oftheir length connected with said source in series with said translatingdevices, and a portion connected to the source in parallel with thetranslating devices, and means for varying the relative lengths oftheportions of the coils so connected.

4. The combination, With the main lines Z'Z2 and the translating devicesd d, operated by currents transmitted over said lines, of the coil P,connected between conductors L and L2 and divided into sections p',132,123, and p4, a core, C, common to all the sections,and means forconnecting the translating devices in shunt upon one or more oi' saidsections, snbstantially as described.

In testimony whereof l have hereunto subscribed my name this 18th day ofNovember, A. D. 1887.

OLIVER B. SHALLENBERGER.

Vitnesses:

REGINALD BELFIELD, WV. D. UPTEGRAFF.

